Tyre-Sensor pressure / temp indicator in the cab

Bob,
I had a look at the Smart Tire system which was about a grand, the Tyre - Sensor system is about $580 delivered in Australia, half the price. I was looking for someone who has some practical experience after actually fitting them or it. An opinion from someone with these systems who can offer an opinion as to if they are any good or not, are they just a gimic that looks good but doesn't do anything?
Thanks for the response, I've been doing the investigation side of things now I'm looking for someone who's fitted them.

Martyn
I paid $150 US on eBay for mine.
I find being able to monitor tyre temperature and pressure very reassuring. It has also helped me to load the vehicle, inflate the tyres, and a select a speed that will help conserve tyres.
I haven't had a tyre deflation since I installed it - the reverse of Murphy's Law. But if I only save one tyre at $250 its paid for itself. Not to mention avoiding a blow out at speed. Or being stranded in the middle of nowhere with three operational wheels.

Sarg
Have you ever trashed a tyre? If not, then you probably won't understand.

A slow leak caused by a nail etc can lead to a tyre failure at speed, trashing the tyre. A tyre pressure monitoring system can help avoid this.

John

Sarg,
Reliability of machinery is a significant part of my job, we have found that on-line monitoring is a good way to ensure reliability of critical machinery hence the reason you have an oil pressure light / guage and an ammeter or ignition warning light and a fuel guage, you monitor critical parameters, to me the tyres and their condition are critical to a safe and successful trip, especially if you are towing something.
You can minimise the the probability of failure by buyng the best equipment available, hence the reason that so many people get value from this forum, discussing critical items such as tyres. Which is the best, why and how much does it cost.
I see your point, and yes it's valid, a good tyre maintenance programme is a good way to MINIMISE failure but the tyre for instance may be fine at the time you carry out your inspection but when you are out in the bush you can't carry out your maintenance programme maybe as conveniently as when you are in the city so the probability of failure rises significantly.
Sarg, this is my point of view and my opinions, I wasn't asking what the point of fitting these gadgets I was asking for people who had fitted them and their experiences, that was all. Sorry if my post doesn't fit with what your perception of what this forum is for.